Grinding-mill.



G. S. EMERICK.

GRINDING MILL.

APPL1cAT1oN-F1LED1uNE6,1912. RENEwED MAY 14.1914.

Patented Feb. 15, 1916.

2 SHEETS-SHEET l.

wirf/:sm: 59S

THE COLUMBIA PLANQGRAPH C0 WASHINGTON. D. c.

G. S. EMERICK.

GHINDING MILL. 4 APPLICATION F1LEn1uNEe,1912. RENEwD MAY 14,1914.

Patented Feb. 15, 1916.

2 SHEETS-SHEET 2.

- mrs/:ron @eogemerz'c/i THE CDLUMBIA PLANOGRAPH co., WASHINGTON, D. c.

TED As'rATEs PATENT oEEicE.

GEORGE s. EMERICK, `E NAZAEETH, PENNSYLVANIA, AssGNoE, EY MESNEr ASSIGN- Y MENTS, T o zr.A WALTER KEELY, 0E PHILADELPHIA, PENNSYLVANIA.

GRINDINiGv-MILL Speccation of LettersPatent. Patented Feb. `i5, 1916.

,Application inea June e, 1912, serial No. 702,042. Renewed May 14,1914. serial No. 838,618.

To all whom it may concern.'

Be it known that I, GEORGE S. EMERICK,

a citizen of the United States, residing at Nazareth, in the countyV of Northampton and State of Pennsylvania, have invented certain new. and useful Improvements vin Grinding-Mills, of which the following is a specification.

This invention relates to grinding or pulverizing mills.

The object of the .invention is to increase the capacity of grinding mills now in use by the provision of a mill inwhich is employed aV plurality of grinding rings, located one within another, and supported and operated so that an exterior grinding face of one ring maycoperate with an interior grinding face grinding operamaterial being ground from one position in the ring to another position therein to in` 'Y crease the eficiency of the mill.

The invention also includes various novel features of construction and combinations of parts: which will be hereinafter,v fully described and claimed.

ln the accompanying drawings, illustrating my invention: Figure 1, is a side elevation, partly in section, on line l-l'of Fig. 2,'

illustrating my improved grinding machine. Fig. 2, is a vertical section, on line2-2 of Fig. 1. Fig. 3, is a vertical section, on line 34-3 of Fig. 2. Fig. 4, is a horizontal section through one of the Vgrinding ringsA and adjuncts, yshowing the feed channels, andthe plows with their coperating parts. v

Referring to thedrawings, 4 designates the base of the machine which may be con# structed of concrete 4or other suitable ma-Y terial. This base is provided with bottom,

side and end .walls forming a chamber to receive the ground material.

Secured to the side walls of the base 4 arel Y plates 5 which are provided with bearings I5 through and between which the main 7 of the machine extends. 4 y

Formed on or secured tothe shaft 7 between the bearings V(iis a grinding roller 8 having a hardened outer portion 9 secured to shaft to the receptacley for the ground material.

the bodythereof. Surrounding the roller 8 i is a grinding ring l0 having an interiork diametergreater than the exterior 'diameter ofY the roller 8, surrounding the grinding ring klOfis a grinding ring 11 having an indiameterV of the ring 10, and surrounding the grinding ring 11 is a grinding ring'12 having an interior diameter greater than shown. The ring 10 rests upon the top of vthe roller 8 and the ring 12, rests upon the top of the ring 11, providing a spaceabove terior ydiameter greater than the exteriorv the lower portion of the inner` face of each grinding ring, as shown, into which the material to be ground may be discharged to be received upon the inner face of each grinding ring, the grinding operation taking place withinthe grinding rings, asvwill be hereinafter explained. Y The material to be ground may be fed to and upon the inner" faces of the grinding rings 10,11 and l2 through inwardly-extending spouts 13, 14 and 15respectively, ex'- tending inwardly from and communicating with the lower, portions of suitably sup-y ported feed hoppers 16.

The ring 11 is made wider than the ring 10 and the ring 12 is made wider-than the f Y ring 11, so that thematerial being ground mayfall from the edges of the-ring 10 to the inner'face' of the ring 11, from the edges of the ringV 11 to the'inner face of the ring 12 and finally from the edges of the ring 12 The inner face of each grinding ring 10, 1

11 and 12 is made concave in cross section 8 when tlie'samev arerotated.

The shaft 7 is rotatably mounted in split collars 17 which are supported byl and mounted to turn inthe bearings 6 about the shaft 7. Extending upwardly from the split collar 17 in each bearing is a frame 18, v comprising a pair of parallel bars 19 eX- tending from the inner end of the collar 17, apair of parallel bars 20`extending from the outerend of the collar 17 and a head Vor top andthe outer face of each ring andthe outer Y membersecured to the upper ends of the bars 19 and 20. rhese bars 19 and 20 form vvertical guideways tov which is fitted a pair shaft 23 carryinga presser roller ar-- ranged above and engaging the topof the.

outer grinding ring 12, the face of the roller 2% being made concavek in cross section to conform to the outer face of the ring 12.

The shaft 23 is bodily movable toward and from the shaft 7 in parallel relation thereto by the movement ofthe bearings 22,-within their guidew'ay in the frames 18.V Thebearings 22 and therewith the shaft 28 and roller 2J.- are forced downward by the action of springs25 to cause the presser roller 24 to foce the grinding rings 10, 11 and 12 into engagement with each other and into enga gement with the grinding roller 8 with the desired crushingpressure during the grinding operation, the springs permitting the roller 24; to yield upwardly as the material being ground passes between the rollers 8 and The bottoms of the springs 25 bear upon the tops of the bearings 22 and the tops of the springs 25 are provided with caps 26 which are engaged by the lower ends of suitable adjusting screws 27 whichare screwed into and through the heads 21,.-whereby, by adjusting the screws 27, the pressure of the springs 25 and perforce the pressure of the roller ma*T be nicely regulated to vary the crushing pressure upon the grinding rings to meet various requirements.

Each frame 18 is movable aboutv he axis of the shaft7 and each frame is maintained normally in the upright position shown by two vertically arranged springs 29 having their lower ends bearing upon the underlying plate 5 and their upper ends bearing against the bottoms of oppositely-disposed -arms 8G projecting laterally7 from the frame 18, one arm and one spring being located. on

one side of the shaft 7, and the other arm and the other spring being located on the other side of the shaft 7. 1t will, therefore, be seen that, while the presser roller 24 :may move toward and from the grinding roller 8A through a, vertical plane extending through the axes of the rollers, as previously described, the presser roller mayalso move transversely to said plane or laterally of 'its anis against the cushioning action of one of the springs 29 for al purpose hereinafter appearing. f

The grinding rings and the presser roller 24 are inclosed above the base i and protected by a suitable sheet metal 4casing l28 which rests Aupon the base and is provided with slots or openings through whichftne shafts 7 and 23 extend.

One end lof the shaft 7 extends outwardly and is provided with a pulley 31 'by means of which power may be applied to the machine. The shaft 23maybe driven instead rings and the pressure of the roller 2.41 which,

during :the operation -of `the machine, rotates about the axis of the shaft 23.' During 80 theactuation of theigrinding roller and grinding rings, the .material `to'be ground is` introduced to one or both of thehoppers 16 and passes from the spouts '18, 14; and 15 and is deposited upon thelower portions of the .inner facesof vthe grinding rings 10,. 11 and 12, respectively. The material is then held against the inner faces of the grinding rings by centrifugal force and the material is thus carried by the rings kduring succesl sive revolutions thereof. As the material thus carried by the grinding rings passes between the rollers 8 -and 2a it is crushed or ground between the coacting faces of the grinding ringsgand the coacting faces ofthe v inner ring 10 and the grinding roller 8. As the ground material accumulates upon theL grinding rings it falls from the edges of an inner ring to an outer ring and is again ground therein and finally falls from :the 10G Vedoes'of the outermost `rin r12 into the receptacle below. y Y ,Y n

During the grinding operation, they presser roller 2L1Ainay yield upwardly against the springs 25 and it may alsoyield laterally 105 of lits axis againstv one of the springs 29I'as the material beingv ground passes between j the rollers 8 `and 24k, thus insuringaliracti? callyaconstant anduniform ycrushing presn sure or action between the grindingriiigs 11o and the innermost ring and the .roller 8k at all times. Y

The spouts 14. and 15 may be' dispensed with so that the material may be` fed only to .the innermost grinding ring thereby ren quiring all the material fed to the machine to be acted upon and ground by all the ringsl 1 successiif'ely lbefore `finally falling from the edges of the outermost ring 12. Also, the rings 10, 11 .and 12 may be made of uniform `120 width sok that the material will only be ground within the ringto which it is fedf` i and will fall from the edges of eachring di` rectly into the receptacle'below.

Due to centrifugal force and the shapeias of therinner facek of each grinding ring,f` there is a tendency for .the material being ground to accumulate about the central` portion of theinner facefof each ring,A and, therefore, in order to .distribute the material n secured thereto.

from the region'of its accumulationl provide each ring with a pair of oppositely'disposedplows B2, one extending into the ring from one side thereof and the other extending into the ring from the other side'thereof. The outer end of each plow is secured to a short horizontal shafty 33 which isV mounted in a bearing 1n*l a vertical wall 34 supported within the base 4.( The outer end Vof eachshat 35 has a horizontal lever.v 35

One end of each lever'earries a weight which tends to turn the'shaft 33 and move the nose et' the plow 32 toward the inner face Ot' its grinding ring, the movement of the plow being limited by the engagement of the other arm of its lever. 35 with an adjustable screw 36 screwed into and through a lug projecting from the wallv 34. By adjusting the screw 86 the interval between the nose of its plow and the face of the grinding ring may be nicely regulated. Each .plow 32 extendsvdownwardly from its shaft 33 and rearwardly or in a direction against the direction of movement of the grinding ring to a position about the central portion oi' the inner face of its grindl'. .infagrinding mill, the combination of a grinding roller, means 4forrotatablysupporting the grinding roller, a-grinding ring surrounding and resting upon the top of the grinding roller, a presser roller engaging the top of the grinding ring, vmeaiisffor rotatably supporting the presser roller, the axis of one roller being movable toward and from f the axis of the other roller, and a spring pressing one roller toward the othervroller.

2. Inha grinding mill, .the combination of a grinding roller, means for rotatably sup-.

porting the grinding roller, a grinding ring surrounding and havmg its-inner face engaged with the grinding roller, a .presser roller engaging the outer face of the grinding ring, means for rotatablysupporting the presser roller, one roller beingv movable toward and from the other roller and' one roller being movable transversely to a plane extending between the axes of said rollers, a spring pressing one roller toward the other roller, andy a spring supporting one roller against Vsaid transverse movement.

3. In a grinding mill, the combination of a grindingroller, means for rotatably supporting the grinding roller, a grinding ring surrounding andhaving its inner face engaged with the grinding roller, apresser roller engagingthe outer face of the grindi ing ring, a. frame movable transversely toa rollers, a part carrying the presser roller and being carried by saidv frame and being movable toward the l-aXisV of rotation of the grindingroller, a spring supporting said Vframe against Said transverse movement, and a spring-pressingsaid part toward the axis of rotation of the'grinding roller.

Vplane extending between 'the axes of saidy In a grinding mill, the combination of V` a grinding roller, means for rotatably supiortin@ the'gr'indino roller a Urindin rinOV7 C G C 3 D 2D surrounding and having its inner'face engalged withthe grinding roller, a'presser ing ring, a pivoted frame movable :on its pivottransversely to 'aV plane extending betweenthe axes of said rollers, a part carrying the presser-roller and being Acarried by said frame and being movable toward the axis otrotatio'n of .the grinding roller, a spring supportingsa'id rameagainst said transverse movement, and a spring.v pressing said part toward the axis of rotation of the grinding roller; j

5. In a grinding mill., the combination of a grinding roller, means for rotatably supporting the grinding roller, Va grinding ring `surrounding and having itsv inner face engaged with the grinding roller, a presser roller engaging the outer face of the grinding ring, a pivotedriframe movable on 'its pivot l-transversely -to a plane lextending between the axes of said rollers, a part-carrying the presser roller and,V being slidably connectedV to said frame and movable-toward the axes of rotation of the grinding roller, a spring supporting 'said-frame againstV said transverse movement, 1 and a roller engaging'the outer face of the grindiosspring pressing said' part toward the-axis` of rotation of the grinding roller.

6. In argrinding mill," the eombination'of a shaft, a grinding roller carried by the sliaft,-a grinding ring surrounding and havinof its inner face engaged 'with the grinding ro lei-,I a press'erroller engaging the'. outer face of lthe-grinding ring, a lcollar surrounding said shaft, supportingmeans for said shaft and said collar, a, frame projecting from said collar, a part carrying the presser'. 1

roller and being carried by saidframe and being movable toward the axis of rotation of the grinding roller, a spring supporting saidframe against movement about theaXis of said shaft, and a/spring pressing said `part toward the axis of rotation of the.

grinding roller.

7. In a grinding mill, the combination of a: shaft, a grinding roller Acarried-by the shaft', a grinding ring surrounding and having its inner face engaged-with the grinding Y roller, a presser roller engaging the outer face of the grinding ring, a collar surrounding said shaft, supporting means for said shaft and saidcollar, a frame projecting 'from said collar, apart carrying the presser roller and beingslidably connected to said frame and movable toivard the axis of rotation of the grinding roller, a spring supporting said frame against movement about theiaxis or" said shaft, and a'springpressing said part toivard the axis of rotation of the grinding roller.

8.In a grinding mill, the combination of a shaft, a` grinding roller carried by the shaft, agrinding ring surrounding and liav ing `its inner vtate engaged with the grinding roller, a presser roller vengaging the outer face of the grinding ring, a collar surround ing said shaft, a bearing surrounding said collar, a frame projecting froin'said collar, a part carrying the presser roller `and being carried by said frame and being movable toivard the axis of rotation of the grinding roller, a spring supporting said frame against movement about the axis of said shaft, and a spring pressing said .part toivard the axis ot rotation of the grinding roller. Y

9. In a grinding mill, the combination of a grinding roller, means for rotatably sup. porting the grinding roller, a grinding ring surrounding and having its inner face engaged with the grinding roller, a presser4 roller engaging the outer face of the grinding ring, a frame movable transversely to a plane extending between the Aaxis of said gaging the outer faceozt' the grinding ring,-`

a.. pivoted frame movable on its pivot transversely to a plane extending between the axes of said rollers, a part carrying the presser roller and being carried by said trame and being movable toivard the axis of rotation of the grinding roller, a springr supporting said frame against movement toivard one side of said plane,a spring supporting lsaid trame against movement toward the other side of said plane7 and a` spring pressing `said partv toivardtheaxis of rotation of the grinding roller.

11'. In a grindingmill, the combination of a grindingroller, means for rotatably supporting the grinding roller, a grinding ring surrounding and having its inner face en-` `invnes'a gage-d, withv the lgrinding roller, meansjto press the ycontacting faces of said roller and said ring together, and a plovvadjacent the inner face of said ring and arranged to .divert the material being ground laterallyof the grinding vtace of the ring. Y

l2. In a grinding mill, the combination of agrinding roller, means for ,rotatably sup:Y

porting the grindinggroller, a grinding [ring] surroundingand having its inner face engaged with the grindingroller, the interior diameter of the central portion .of said ring4 being greater than the interior diameteirof the side portions tliereoi', means to press the contacting faces` of said' roller kand said `ring of said-ring and arrangedto divert 'the material :being ground laterally of the grindingfaee of the ring.;v Y

13. In a grinding mill, the combination olii` a grindingi'oller, means for rotatably supportingthe grinding roller,a grinding ring surrounding and having itsinner face en gaged kivith the grinding; roller,` means to piessvthe contacting Vraces of said roller and said ring and arranged' to divert the inaterialf being` ground laterally of thegrind-Y ingface of the ring, meansy tending to move said plow toward said face, and meansto limit :the movement of the ploiv.

let. In a grinding mill, thecombination` `so together, and a ploiv adjacent` the inner face i '90 said ring together, a plow.4 adjacent andi movable toward and from" the inner tace otof a grinding roller, means tor 'rotatablyY supporting the grinding roller, a grinding ring surrounding and having Vits inner face having its inner tace Aengaged with the outer faces of the rst named ring, and nieansrto y engaged'ivitli the grinding roller, ai grinding Y ring surrounding `the :first named ringand press the contacting faces of Vsaid roller and said rings together.

15. In a grinding `inill, `the combination of a grinding roller, means for rotatably i supporting the grinding roller, a grinding ring surrounding and havingV its inner face engaged with the grinding roller, a grindingr-ing ivider than and surrounding `the first named ring andv having itsinner faceengaged `With :the outer face ot' tlieI-rst named ring, and means to press the Contact# i ing `faces of said roller and said rings to'y gether.

16. In a grinding mill, lthe combination oit a grinding.roller,'means for` rotatably supporting lthe grinding roller, a grinding j ring surrounding and havingits inner face i engaged With the grinding roller, a grind-ii ing ring surrounding the'iirst named ring` and having its' inner face engaged with the outer face of the rst named ring, apresser roller engagingthe outerffaee ofA thee outer grinding ring, means for rotatably support-ing'the pressern'oller, and a spring;

pressing one roller toward the other roller.

' ring surrounding the irst named ring and' 17. In a grinding mill, the combination of a vgrinding roller, means for rotatably supporting the grinding roller, a grinding ring surrounding and having its inner face engaged with the grinding roller, a grinding ring Wider than and surrounding the first named ring and-having its inner face engaged With the outer face of the first named ring, a'presser` roller engaging the outer face of the outer grinding ring, meansV for rotatably supporting the lpresser roller, and a spring pressing one roller toward the other roller.

18. In a grinding mill, the combination of a grinding rol-ler, means for rotatably supporting the grinding roller, a grinding ring sui-rounding and having its inner face engaged with the grinding-roller, a grinding ring Wider than and surrounding the rst named ring and having its-inner face engaged with the outer face of the first named ring, the inte ior diameter 'of the central" portion of the second named ring being greater than the interior diameter of the side portions thereof, and means to press' the contacting faces of said roller and said rings together.

19. In a grinding mill, the combination of a grinding roller, means for rotatably supporting the grinding roller, a grinding ring surrounding and having its inner Vface engaged With the grinding roller, a grinding having its inner face engaged With the outer face of the iirst named ring, a presser roller engaging the outer face of the outer grinding ring, means for rotatably supporting die presser roller, one roller being movable toward and from the other roller and one roller being movable transversely to a plane extending betiveen'the aXes of said rollers,

a. spring pressing one roller toward the other rollei, and a spring supportingone roller against said transverse movement.`

20. In a grinding mill, the combination of a grinding roller, means for rotatably supporting the grinding roller, a grinding ring surrounding and ha 'ing Yits inner face engaged with the grinding roller, a grinding ring surrounding the first named ring andv having its inner face engaged .with the outer face of the first named ring, a presser roller Copies of this patent may be obtained for p engaging the outeri'face ofthe outer grinding riiig,1a .frame movable transversely to a plane extending between; the aXes' of said rollers, a part carrying the-presser roller and beingca'rri'ed by said frame andl being movable toward the axis of rotation of the grinding-roller, a spring supportingsaid frame against said; transverse fmovement, and a springpressing said part 'tovvard the axis of rotation of thelgrinding roller. v

2l. kIn a Vgrinding mill, the combination of a grinding roller, means'for rotatably supporting the grinding roller, agrinding ring surrounding and having its vinner face engaged Withtliegrinding roller, a grinding ring surrounding the firstnamed ring and having its inner face engaged vvith the outer 'face of the first named ring, a presser roller engaging the outer face of the outer grinding ring, a frame movable transversely to a planeextending between the axes of said rollers, a part carrying, the presser roller f and-being carried by said frame and being lmovable toward the aXisof rotation of the lgrinding roller, a spring supporting said frame against movement toward one side of said plane, aspring supporting said frame against movement toward. the lother side of said plane,fand asprifng pressing said part toward the axis of rotationl of thegrindin'g roller. W s f ,y i

22. In a grinding mill, the combination of two substantially vertically-arranged grinding rings, and means cooperating with' said rings to Vgrind material therein', one ring having an inner grinding face located be- Y in presence of tivo-Witnesses.`

f esoneri s. "niniiaioinv Witnesses Y L; B. CHEVALIER, ELLIS C. HELLICK. Y

five cents each, by addressing' .the Commissioner of Patents, Washington, D. C." 

